Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
dang xay » dang van, van xay
hanh tai » hang tai, han tai, hinh tai
cua tre » cua te, cuu tre, cua triet
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
cuc tre » duc tre, cuu tre, cuc thue
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
tuc va » thuc va, truc va, tuc xa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky dang xay hoi. hieu va cac tuc va ((hanh tai) OR (thanh tai)) ((cuc tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang xay hoi. hieu va cac tuc va ((hanh tai) OR (thanh tai)) ((cuc tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky dang xay hoi. hieu va cac tuc va ((hanh tai) OR (thanh tai)) ((cuc tre) or (cua tre))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang xay hoi. hieu va cac tuc va ((hanh tai) OR (thanh tai)) ((cuc tre) or (cua tre))*.